Piston fixing tool

Abstract

The utility model discloses a piston fixing tool, and relates to the field of production and manufacturing. The piston fixing tool comprises a mounting shaft and a fixing mechanism used for fixing a piston during piston machining, the mounting shaft is fixedly connected with the fixing mechanism, and the axis of the mounting shaft penetrates through the fixing mechanism; the fixing mechanism comprises a fixing block, a U-shaped rod and a sliding rod, the fixing block is provided with a kidney-shaped hole for the sliding rod to penetrate through, the sliding rod penetrates through the kidney-shaped hole to be connected with the U-shaped rod, the fixing block is provided with a guide hole in the vertical direction, and the fastening mechanism penetrates through the guide hole to be connected with the sliding rod in a fastened mode. A containing area used for containing the extending portion of the piston is formed between the U-shaped rod and the fixing block, and when the fastening mechanism is tightened, the U-shaped rod extrudes the extending portion of the piston so that the piston can be pressed and fixed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of piston processing equipment, in particular to a piston fixing tool. BACKGROUND

[0002] As a core component of internal combustion engine, compressor and other mechanical devices, the machining precision of the piston directly affects the sealing performance and operating efficiency of the equipment. In the piston manufacturing process, it is usually necessary to perform precise machining such as turning and milling on the piston to ensure that the fitting size and surface roughness of the piston meet the design requirements. When performing precise machining such as turning and milling, the piston needs to be fixed.

[0003] The conventional fixture usually adopts a multi-point bolt locking structure, and the operator needs to tighten a plurality of bolts one by one in the circumferential direction of the piston to achieve radial fixation. This method not only has a complicated operation process and takes a long time, but also is prone to cause the piston to deviate slightly due to uneven bolt pre-tightening force, thereby affecting the machining concentricity. Obviously, the conventional fixture usually cannot be quickly replaced, and the bolts need to be repeatedly disassembled and recalibrated when adjusting the positioning, thereby reducing the machining efficiency.

[0004] Moreover, for the piston with an extended end portion, a specific structure needs to be provided to adapt to the end portion of the piston. In addition, for the piston end portion with a sawtooth structure, the conventional fixture lacks effective anti-rotation limiting design, and the piston is prone to circumferential movement due to the cutting force during turning, thereby causing processing surface vibration marks or size out-of-tolerance. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the problem that the piston cannot be quickly and stably fixed during machining in the prior art, the present application provides a piston fixing tool, and the specific scheme is as follows:

[0006] The piston fixing tool comprises a mounting shaft and a fixing mechanism for fixing the piston during machining, the mounting shaft is fixedly connected with the fixing mechanism, and the axis of the mounting shaft passes through the fixing mechanism; the fixing mechanism comprises a fixed block, a U-shaped rod and a sliding rod, the fixed block is provided with a waist hole through which the sliding rod passes, the sliding rod is connected with the U-shaped rod through the waist hole, the fixed block is provided with a guide hole in the vertical direction, and a fastening mechanism is fastened with the sliding rod after passing through the guide hole; the U-shaped rod and the fixed block form a containing area for placing the extended portion of the piston, and the U-shaped rod extrudes the extended portion of the piston to achieve compression and fixation of the piston when the fastening mechanism is tightened.

[0007] Preferably, the fixed block is provided with two symmetrical sliding grooves, and the two ends of the U-shaped rod are arranged in the sliding grooves respectively, and the U-shaped rod can drive the sliding rod to move along the waist hole when the U-shaped rod moves along the sliding groove.

[0008] Preferably, the fixing block has a lower plane, and a plurality of limiting teeth are fixed on the lower plane, the limiting teeth are arranged in the tooth groove of the sawtooth part of the piston when the fastening mechanism is tightened, and the limiting teeth limit the piston in the horizontal direction.

[0009] Preferably, the fastening mechanism comprises a bolt which is screwed with the slide rod.

[0010] Preferably, the mounting shaft is coaxial with the fixing mechanism.

[0011] Preferably, the mounting shaft is eccentric to the fixing mechanism.

[0012] Preferably, the mounting shaft is integrally formed with the fixing mechanism.

[0013] One or more technical solutions provided in the application have at least the following technical effects or advantages:

[0014] 1. By pushing the U-shaped rod and tightening the fastening mechanism, the piston can be pressed and fixed, which can realize quick disassembly and assembly of the piston and improve the processing efficiency.

[0015] 2. By arranging the limiting teeth, the displacement of the piston in the horizontal direction can be limited, the fixing effect of the piston is further enhanced, and the subsequent processing is facilitated. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0017] Figure 1 is a structure schematic view of the piston fixing tool of the application with a piston installed;

[0018] Figure 2 is a structure schematic view of the piston fixing tool of the application without a piston installed;

[0019] Figure 3 is a structure schematic view of the piston fixing tool of the application without a U-shaped rod;

[0020] Figure 4 is a schematic view of the piston of the application.

[0021] In the figure: 1, mounting shaft; 2, fixing mechanism; 21, fixing block; 211, waist hole; 212, guide hole; 22, U-shaped rod; 23, slide rod; 24, slide groove; 25, limiting tooth; 3, accommodating area; 4, piston; 40, extension; 41, sawtooth part. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings of the present application. Obviously, the embodiments described in the present application are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] Please refer to Figures 1 to 4 , the piston fixing tool includes a mounting shaft 1 and a fixing mechanism 2 for fixing the piston 4 during processing of the piston 4, the mounting shaft 1 is fixedly connected with the fixing mechanism 2, and the shaft center of the mounting shaft 1 passes through the fixing mechanism 2; the fixing mechanism 2 includes a fixed block 21, a U-shaped rod 22 and a sliding rod 23, the sliding rod 23 passes through the fixed block 21 horizontally to form a waist hole 211, the sliding rod 23 is fixedly connected with two ends of the U-shaped rod 22 respectively, the U-shaped rod 22 can drive the sliding rod 23 to move along the waist hole 211 when the U-shaped rod 22 moves, the fixed block 21 is provided with a guide hole 212 in the vertical direction, the guide hole 212 can be passed through by a fastening mechanism, the fastening mechanism is fastened with the sliding rod 23 after passing through the guide hole 212, the U-shaped rod 22 and the fixed block 21 form a containing area 3 for placing an extension part 40 of the piston 4, the U-shaped rod 22 extrudes the extension part 40 of the piston 4 to realize compression and fixing of the piston 4 when the fastening mechanism is tightened. Figure 4 Please refer to , the extension part 40 of the piston 4 refers to the part extending outward from the body of the piston 4.

[0024] Figure 1 Specifically, please refer to Figure 3 and , the fixed block 21 is provided with two symmetrical sliding grooves 24, the two ends of the U-shaped rod 22 are arranged in the sliding grooves 24 respectively, the U-shaped rod 22 can drive the sliding rod 23 to move along the waist hole 211 when the U-shaped rod 22 moves along the sliding grooves 24, the sliding grooves 24 can limit the U-shaped rod 22, so as to facilitate control of the moving direction of the U-shaped rod 22.

[0025] Specifically, the fixed block 21 has a lower plane, a plurality of limiting teeth 25 are fixedly arranged on the lower plane, the limiting teeth 25 are arranged in the tooth grooves of a sawtooth part 41 of the piston 4 when the fastening mechanism is tightened, and the limiting teeth 25 limit the piston 4 in the horizontal direction; the sawtooth part 41 of the piston 4 is fixedly arranged on the upper side of the extension part 40 of the piston 4.

[0026] Specifically, the fastening mechanism includes a bolt, and the bolt is threadedly connected with the sliding rod 23.

[0027] Specifically, the mounting shaft 1 is coaxial with the fixing mechanism 2, or the mounting shaft 1 is eccentric with the fixing mechanism 2.

[0028] Specifically, the mounting shaft 1 is integrally formed with the fixing mechanism 2.

[0029] During the machining process, when the piston 4 needs to be fixed, first, the extension part 40 of the piston 4 is placed in the accommodation area 3, and the sawtooth part 41 of the piston 4 is directed towards the lower plane; second, the limiting teeth 25 are arranged in the corresponding tooth grooves; finally, the U-shaped rod 22 is pushed upwards, and the bolt is tightened, so that the U-shaped rod 22 extrudes the extension part 40 of the piston 4 to achieve the compression and fixation of the piston 4.

[0030] In summary, the present application can realize the quick clamping and accurate positioning of the piston, thereby improving the machining quality and production efficiency of the piston.

[0031] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0032] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A piston fixing tool characterized by, The application relates to a fixing mechanism for fixing a piston during processing of the piston, and a mounting shaft fixedly connected with the fixing mechanism and having an axis penetrating the fixing mechanism; the fixing mechanism comprises a fixing block, a U-shaped rod and a slide rod, the fixing block is provided with a waist hole for the slide rod to penetrate, the slide rod is connected with the U-shaped rod through the waist hole, the fixing block is provided with a guide hole in a vertical direction, a fastening mechanism is fastened with the slide rod after penetrating the guide hole, the U-shaped rod and the fixing block form a containing area for placing an extension of the piston, and the U-shaped rod extrudes the extension of the piston to realize compression fixing of the piston when the fastening mechanism is tightened.

2. The piston securing fixture of claim 1, wherein, The fixing block is provided with two symmetrical slide grooves, the two ends of the U-shaped rod are arranged in the slide grooves respectively, and the U-shaped rod can drive the slide rod to move along the waist hole when the U-shaped rod moves along the slide grooves.

3. The piston securing fixture of claim 1, wherein, The fixing block has a lower plane, a plurality of limiting teeth are fixedly arranged on the lower plane, the limiting teeth are arranged in tooth grooves of a sawtooth part of the piston when the fastening mechanism is tightened, and the limiting teeth limit the piston in a horizontal direction.

4. The piston securing fixture of any one of claims 1 to 3, wherein, The fastening mechanism comprises a bolt which is threadedly connected with the slide rod.

5. The piston securing tool of any one of claims 1 to 3, wherein, The mounting shaft is coaxial with the fixing mechanism.

6. The piston securing tool of any one of claims 1 to 3, wherein, The mounting shaft is eccentric to the fixing mechanism.

7. The piston securing fixture of any one of claims 1 to 3, wherein, The mounting shaft is integrally formed with the fixing mechanism.

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